package com.zxinlee.order.service.impl;

import com.zxinlee.order.entity.Order;
import com.zxinlee.order.feign.AccountClient;
import com.zxinlee.order.feign.EasyIdClient;
import com.zxinlee.order.feign.StorageClient;
import com.zxinlee.order.mapper.OrderMapper;
import com.zxinlee.order.service.OrderService;
import io.seata.spring.annotation.GlobalTransactional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Random;

@Transactional //本地事务
@GlobalTransactional //开启全局事务
@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private EasyIdClient easyIdClient;

    @Autowired
    private AccountClient accountClient;

    @Autowired
    private StorageClient storageClient;

    @Autowired
    private OrderMapper orderMapper;

    @Override
    public void create(Order order) {

        // TODO : 从全局唯一id发号器获得id，这里暂时随机产生一个 orderId
        //Long orderId = Long.valueOf(new Random().nextInt(Integer.MAX_VALUE));
        Long orderId = Long.valueOf(easyIdClient.nextId("order_business"));
        order.setId(orderId);

        orderMapper.create(order);

        //if (Math.random() < 0.5) {
        //    throw new RuntimeException("模拟异常");
        //}

        // TODO: 调用storage，修改库存
        storageClient.decrease(order.getProductId(),order.getCount());

        // TODO: 调用account，修改账户余额
        accountClient.decrease(order.getUserId(),order.getMoney());

    }
}
